package com.gh.controller;

import com.gh.entity.CommonResult;
import com.gh.entity.Payment;
import com.gh.lb.LoadBalancer;
import lombok.extern.slf4j.Slf4j;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.cloud.client.ServiceInstance;
import org.springframework.cloud.client.discovery.DiscoveryClient;
import org.springframework.http.ResponseEntity;
import org.springframework.web.bind.annotation.GetMapping;
import org.springframework.web.bind.annotation.PathVariable;
import org.springframework.web.bind.annotation.RestController;
import org.springframework.web.client.RestTemplate;

import java.net.URI;
import java.util.List;

/**
 * @Author Eric
 * @Date 2021/7/28 21:21
 * @Version 1.0
 */
@RestController
@Slf4j
public class OrderController {

    //public static final String PAYMENT_URL="http://localhost:8001";
    public static final String PAYMENT_URL = "http://CLOUD-PAYMENT-SERVICE";

    @Autowired
    private RestTemplate restTemplate;

    @Autowired
    private LoadBalancer loadBalancer;

    @Autowired
    private DiscoveryClient discoveryClient;

    @GetMapping("consumer/payment/create")
    public CommonResult<Payment> create(Payment payment) {
        ResponseEntity<CommonResult> commonResultResponseEntity = restTemplate.postForEntity(PAYMENT_URL + "/payment/create", payment, CommonResult.class);
        CommonResult commonResult = commonResultResponseEntity.getBody();
        return commonResult;
    }

    @GetMapping("consumer/payment/get/{id}")
    public CommonResult<Payment> getPayment(@PathVariable Long id) {
        return restTemplate.getForObject(PAYMENT_URL + "/payment/get/" + id, CommonResult.class);
    }

    @GetMapping("consumer/payment/lb")
    public String getPaymentLB() {
        List<ServiceInstance> instances = discoveryClient.getInstances("CLOUD-PAYMENT-SERVICE");
        if (instances == null || instances.size() <= 0) {
            return null;
        }
        ServiceInstance instance = loadBalancer.instance(instances);
        URI uri = instance.getUri();
        return restTemplate.getForObject(uri+"/payment/lb",String.class);
    }

}
